import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description: 牛客网.简单题.计算体重指数
 */

class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double height = scanner.nextDouble();
        double weight = scanner.nextDouble();

        //write your code here......
        double ret = weight / (height * height);
        if(ret < 18.5) {
            System.out.print("偏瘦");
        }else if(ret < 20.9) {
            System.out.print("苗条");
        }else if(ret < 24.9) {
            System.out.print("适中");
        }else {
            System.out.print("偏胖");
        }

    }
}

public class Test {
}
